irrational

not thinking or behaving in a sensible way ไม่มีเหตุผล

Former American Idol finalist Adam Lambert brushed off his arrest in Finland last Thursday, blaming his bad behaviour on travel, alcohol and ''irrational confusion''.

Keeping so much water in the dams was "simply irrational," he said.

It is unrealistic and irrational to expect the new company chief to be able to single-handedly solve the chronic and complicated problems which have plagued the firm for years.